Key Holder

I saw ProteanMan's "Proteus Key Holder" https://www.thingiverse.com/thing:2749745, but my keys would not fit in it. I tried to improve his design to automatically generate spacers, have text, and have a ton of other customized stuff that makes me feel overwhelmed.

My older version has text that was "engraved" https://photos.app.goo.gl/R7EbuJgKD9n5Mcq78, but I learned that my printer (Prusa i3 MK2) has Prusa Control where I can tell the printer which layer I want to stop and change out the fil